SMART Embedded Computing AXP1440-C07 Installation And Use Manual page 25

This equipment shall be located in the same immediate area (such as adjacent

cabinets) as any other equipment that has a connection between the earthed
conductor of the same DC supply circuit and the earthing conductor, and also the
point of earthing of the DC system. The DC system shall not be earthed elsewhere.
The DC supply source shall be located within the same premises as this

equipment.
Make sure you have an earth ground connection that is free of any disconnecting

device, such as a power switch or fuse, between the DC source and the earth
ground connector. A disconnecting device could result in the ground being
disconnected and the potential of injury from electrical shock.
System Overheating
If you set the fan speed manually through the shelf manager, constantly monitor the system
temperature to prevent overheating.
Make sure that the environmental and power requirements are met while operating the
system.
Injuries or Short Circuits - Blade or Power Supply
If the ORing diodes of the blade fail, the blade may trigger a short circuit between input line
A and input line B so that line A remains powered even if it is disconnected from the power
supply circuit (and vice versa).
To avoid damage or personal injury, always check that no hazardous voltage is present
before servicing equipment.
Expansion
System Overload
To avoid an overload of the system, check the total power consumption of all components
installed. Make sure that the individual output current of any source stays within its
acceptable limits (see the technical specification of the respective source or component).
Loss of Safety Compliance - Using Additional Plug-in Blades
The system may become noncompliant by the addition of plug-in cards. Regulatory
compliance is the responsibility of the system integrator.
AXP1440-C07 Installation and Use (6806800V18A)
Safety Notes
23